Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"mass variations"”.
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Calibration of the global hydrological model WGHM with water mass variations from GRACE gravity data
… to study geophysical and climatologically-driven mass redistributions on the Earth's surface. In particular, GRACE observations of total water storage changes (TWSV) provide a comprehensive data set for analysing the water cycle on large scales. Therefore they are invaluable for validation and …
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Estimations of rail irregularities
… The effects due to two major uncertainties, mass variations and speed variations, are evaluated by using the Singular Value Decomposition in order to present the limitations of the estimation using a nominal model. In addition, this thesis proposes a compensation method for mass variations …
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Optimization and Modeling Tools for Telescope Hexapod Structures
… and stiffness behavior under geometric and mass variations of such structures is largely undocumented. Furthermore, the ability to quickly model hexapod designs and explore a large design-space in finite element software packages is, in general, time consuming and inefficient. The purpose of …
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Interfacial Study of Copper Electrodeposition with the Electrochemical Quartz Crystal Microbalance (EQCM)
… an effective mean of monitoring up to nano-scale mass changes related to electrode potential variations at its surface. The principles of operation are based on the converse piezoelectric response of quartz crystals to mass variations on the crystal surface. In this work, principles and operations …
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Simulationen hydrologischer Massenvariationen und deren Einfluss auf die Erdrotation
… Sekundäreffekten, wie Einflüssen hydrologischer Massenvariationen. Variationen der Erdrotation durch hydrologische Massenvariationen sind bisher weniger gut als atmosphärische und ozeanische Beiträge erforscht. Zur Interpretation, Analyse und Zuordnung von Signalen in den Erdrotationsparamtern …
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Zur Ermittlung geophysikalischer Massensignale mit Schwerefeldmissionen: Eine Analyse des gegenwärtigen Standes am Beispiel der Antarktis
… GRACE hat hier das Potential, zeitliche Massenänderungen (unter anderem der Eismasse) zu beobachten. Methoden zur Auswertung der Missionsdaten befinden sich gegenwärtig in einem intensiven Entwicklungsprozess, zu dem die vorliegende Arbeit beitragen soll. Inhaltlicher Schwerpunkt ist die …
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Modelling and analysis of vibrations in flexible cylinders subjected to internal multiphase and external single-phase flows.
… as problematic due to fluctuations in multiphase mass, velocities and pressure changes causing slug flow-induced vibrations (SIV). Most of the literature related to internal single and two-phase flow has largely focused on the use of a linearised tension beam model. Fundamental understanding of …
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The influences of dark matter halo formation history on black hole growth, circumgalactic gas expulsion and galaxy evolution
… in the relationship between the gas fraction and mass of dark matter haloes hosting present-day ~L* central galaxies in the EAGLE simulations. The scatter is uncorrelated with the accretion rate of the central galaxy's black hole (BH), but correlates strongly and negatively with the BH's mass, …